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Cellular Back Door

Wireless Phone Number Finder


Identify the cellular carrier that supplies service to a phone customer and their location. Visit these sites and enter the 6-digit Area Code and Prefix (NPA-NXX) of the wireless number. A few areas have numbers assigned to different carriers based on the 7th digit. Some numbers may no longer conform to these records after having been "ported" through Local Number Portability. In those cases, only the original assignment is shown. Some old cellular company names are shown as that is how they are still listed in the administrator's records. 



  • TELCO DATA
    A frequently-updated and easy-to-use site. Enter your Area Code and Prefix and get a result of the name and location of the wireless and wireline carrier that was originally assigned that Prefix.


  • NANPA
    The official Area Code & Prefix-assigning organization. Choose a state and you get all Prefixes for that state and Area Code, wireless and wireline. The results are large files.


  • FONE FINDER
    Enter the first 6 or 7 digits to get a result. The site includes Canadian and other international numbers.


  • LOCAL CALLING GUIDE
    A database that provides a cross-reference among switches and local calling areas which can be tailored with a small or great amount of detail. Use this site to find what exchanges are 'Local' to a particular cell phone number. It also refers back to the NANPA database.


  • IS IT LOCAL?
    Find out if there is a long distance charge to call from one prefix to another. This applies mostly for wireline-to-wireless and wireline-to-wireline numbers. This is a great resource to find a wireless number that is local to your home phone.


  • NUMBER INVESTIGATOR
    Find the carrier of any US phone number with additional resources to also find the owner. Also find and report scammers, telemarketers, debt collectors and prank callers.